Tooth-separator



1. w." IVORY.

TOOTH SEPARATOR.

APPLICATION FILED MA R.4. i919.

1,306,696. PatentedJune 17, 1919.

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UNITED STATES PATENT OFFICE.

JAMES W. IVORY, OF PHILADELPHIA, PENNSYLVANIA.

TOOTH-SEPARA'I'OR.

Specification of Letters Patent.

Patented June 17', 1919.

Application filed March 4, 1919. Serial No. 280,618.

To all whom it may concern Be it known that I, J AMIES W.'IvoRY, asubject of the King of Great Britain, residing in the city and county ofPhiladelphia, State of Pennsylvania, have invented a newand usefulTooth-Separator, of which the following is a specification.

My invention relates to a tooth separator which may be of the Elliotttype shown in the Letters Patent of the United States No. 426,258granted April 22nd, 1890, and consists of an attachment to suchseparator, whereby the latter is prevented from tilting longitudinally,or laterally, or sliding on the gums, and necks of the teeth, orotherwise changing its position.

The invention is satisfactorily illustrated in the accompanying drawingbut the important instrumentalities thereof may be varied, and so it isto be understood that the invention is not limited to the specific de'Fig. 4 represents a perspective view of an Similar numerals of referenceindicate corresponding parts in the figures.

Referring to the drawings.

1 designates pivoted arms on which are the separating wedges 2, saidarms being adapted to be operated by the yoke 3, and the thumb screw 4:,as well known to the dental trade in the Elliott separator.

The terminals of said arms are extended back of the wedges 2 and raisedforming the beds 5 in which are the slots 6, the latter receivingthe'screws 7. Seated on said beds and having the screws 7 pass throughopenings in the same are the anchor plates 8, the

peripheries of which are provided with lips 9 which are adapted toproject angularly therefrom into said slots 6 of the beds 5 and soprevent improper rotation of said plates and other parts supportedthereon. On said screws 7 above said plates 8 are the milled nuts 10,the resilient bows 11, the limbs of the latter having therein theelongated slots 12 and 13, it being noticed that the'said slots areadapted to have the screws 7 pass upwardly therethrough, the threadedends of the same having thereon the cap nutslet which are adapted totighten against the upper limbs of the bows 11, and thus adjust thedegree ofdivision of the bows, and hold the bows in adjusted positionassisted by the lower or inner nuts 10 and firmly clamping. thecontiguous members on the beds 5. j j

The bows are formed of elongated plates of metal or other suitablematerial bent on each other into somewhat elliptical shape rendering thelimbs thereof resilient, the

lower limbs having theirinner ends facing inwardly toward the tooth soas to engage the buccal and lingual sides thereof, the edges of saidlimbs being somewhat concave to conform to the shape of the portions ofthe tooth, with which they contact, it being seenalso that owing totheelongated slots 12 and 13 in thesbows, the latter may be moved in andout and'raised and lowered, and so be adjusted with nicety in lateraland vertical directions to the tooth with which they are to engage, andwhen so adjusted. the cap nut is tightened and so the bowsre tain theirpositions.

Attention is drawn to the fact that the bows are in hlgher planes thanthe wedges 2," consequently the upper limbs of said" vented from'dropping or sliding on the gumsytilting in any direction, or otherwisechanging its position.

The operation is as follows As the wedges of this separator engage theteeth, and the separation begins, the terminals of the bow plates beingin position, the lower arms are against the buccal or lingual side ofthe teeth, and the upper arms rest on the biting or grinding edge of theteeth, the entire spring being only loosely held on the nuts on thepost. As the separation takes place and the jaws move forward toward oneanother to make the same, the lower arm of the plate forces the entirespring on both sides in the reverse Way to which the wedge is moved,this being held in position while the separation is going on.

\Vhen the separation is sufiicient the cap nut of the post is made tautagainst the upper arm and the lower arm resting against the lower nut onthe post, holding it in place, thus preventing the jaws of the separatorfrom tilting or being allowed to sag down on the tissues of the gun.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent, is

1. A tooth separator formed of arms, and wedges thereon, and meansengageable with said arms whereby said wedges are adapted to beoperated, and further of means mounted on or about the extreme ends ofsaid arms adapted to engage a tooth for preventing the separator when inuse from changing its position.

2. A tooth separator provided with arms, and wedges thereon, andattachments on said arms adapted to prevent the separator when in usefrom changing its position, said attachment being in a higher plane thansaid wedges whereby it may be engaged with a tooth independent of saidwedges.

8. A tooth separator formed of arms, and wedges thereon, beds on saidarms, and bowlike members adapted to be supported ad justable on saidbeds and to engage a tooth whereby the separator when in use isprevented from changing its position.

4:. In a tooth separator,resilient bow-like members adapted to engage atooth inde pendent of the wedges of the separator, screws on the arms ofsaid separator adapted to connect said bow-like members with said arms,and means on said screws for retaining said members firmly on said arms.

5. In a tooth separator, resilient bow-like members adaptedto engage atooth independent of the wedges of the separator, screws on the arms ofsaid separator adapted to connect said bow-like members with said arms,and means on said screws for retaining said members firmly on said arms,said bow-like members being adapted to be adjusted vertically andlaterally on said screws.

6. A tooth separator provided with arms and wedges thereon, and meansengageablewith said arms Whereby said wedges are adapted to be operated,resilient members adapted to be supported on said arms, screws on thelatter adapted to have said members fitted thereto, and nut-like memberson said screws on opposite sides of said members,

whereby the latter may be adjusted in the direction of the length ofsaid screw relatively to a tooth with which they engage independent ofsaid Wedges and tightened in their adjusted position.

7 In a tooth separator, resilient bow like members adapted to engage atooth independent of the wedges of the separator, screws on the arms ofsaid separator adapted to connect said bow-like members with said arms,and means on said screws for retaining said members firmly on said arms,said members having therein elongated slots which receive said screwswhereby the members are adjustable in lateral directions.

8. In a tooth separator provided with arms, and wedges thereon, andmeans engageable with said arms whereby said wedges are adapted to beoperated, slotted beds on said arms, resilient attachments on said bedsadapted to prevent the separator when in use from changing its position,screws connectible with said beds, and attachments for supporting thelatter on the former, butts on said screws on opposite sides of saidattachments for adjusting and securing the latter in position, andanchorplates on said screws intermediate of said beds and adjacent nuts,said plates having therein projections which are adapted to be fitted inthe slots of said beds.

JAMES W. IVORY.

\Vitnesses:

J 01m A. VVIEnnRsHmM, N. BUSSINGER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). G.

